When wolves were reintroduced to Yellowstone National Park in the United States after being absent nearly 70 years, the most remarkable “trophic cascade” occurred. What is a trophic cascade and how exactly do wolves change rivers? George Monbiot explains in this movie remix.
@ Films for Action
this is so amazing
Bonus to watching the video: Cute wolf pups! Also, you’ve probably never heard someone so gleefully excited about carrion.
Note: Most of the time the narrator talks about deer, the video is showing pictures of elk — and everything I’m finding on further research says that particular trophic cascade pattern in Yellowstone is most directly related to ELK, not deer. (Elk are of the deer family, but much bigger than the species that usually come to mind when you hear ‘deer’. Those are critters like white tail and mule deer, which also live in the park).
Trophic Cascades at Nature.com, cited, with further reading
Trophic Cascades & Keystone Species at the Wildlands Network